Caught in the act: sex and the fossil recordVideo | Updated 7 years ago Dr Kate Trinajstic, Vertebrate Palaeontologist, Curtin University Sex and sexual behaviour in fossils has largely remained a mystery. Seeking evidence of sex is one of the most difficult endeavours in palaeontology, but new discoveries from WA are changing all of this. Chevron are a presenting partner for the "In the Wild West" lecture series.